CN107096578A - A kind of renovation process of arsenic poisoning SCR denitration - Google Patents
A kind of renovation process of arsenic poisoning SCR denitration Download PDFInfo
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- CN107096578A CN107096578A CN201710389357.7A CN201710389357A CN107096578A CN 107096578 A CN107096578 A CN 107096578A CN 201710389357 A CN201710389357 A CN 201710389357A CN 107096578 A CN107096578 A CN 107096578A
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- scr denitration
- regenerated
- arsenic poisoning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/60—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using acids
- B01J38/62—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using acids organic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/64—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using alkaline material; using salts
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
A kind of renovation process of arsenic poisoning SCR denitration, its main contents include：Arsenic poisoning SCR denitration is ground to form into powdery first；Catalyst fines is impregnated in regenerated liquid again, 2 hours reaction time, it is all 1mol/L that regenerated liquid, which meets acetic acid and concentration of sodium carbonate,；Isolating regenerated catalyst and being rinsed repeatedly with deionized water causes cleaning fluid pH to 6.5 7；Regenerated catalyst is positioned in constant temperature blast drying oven, 110 DEG C dry 12 hours, that is, obtains regenerating SCR denitration.It is characteristic of the invention that regenerated liquid raw material is easy to get, financial cost is low, energy consumption is small, preparation technology is simple and does not result in secondary pollution.
Description
Art
The invention belongs to SCR denitration regeneration field, and in particular to a kind of regeneration of arsenic poisoning SCR denitration
Method.
Background technology
At present, coal-burning power plant of China accounts for national generating capacity more than 70%, selective catalytic reduction (SCR) denitrating flue gas skill
Art is widely used in domestic and international coal-burning power plant as one of most ripe gas denitrifying technology.SCR catalyst is used as SCR denitration skill
The core of art, projected life is about 24000 hours, can gradually be reduced with the increase activity of run time.Catalyst is caused to be lived
The problems such as the reason for property is reduced has catalyst poisoning, sintering of catalyst and loss of active component, ultimately results in catalyst inactivation.So
And, causing the material of catalyst poisoning mainly has alkali metal, alkaline-earth metal, phosphorus, heavy metal, HCl etc..
Because the most coal arsenic contents of China are higher, coal-burning power plant's coal combustion can discharge most of arsenic in producing coal and deposit
It is in flue gas.Arsenic in flue gas is caused in catalyst heavy metal arsenic while nitrogen oxides can be removed in SCR denitration system
Poison, so as to reduce the activity of SCR catalyst, influences denitration efficiency.Coal-burning power plant changes waste catalyst every year, not only increases de-
Nitre runtime cost, returns environment and brings white elephant.Waste catalyst dosage cumulative year after year, regenerating waste SCR catalyst,
It is particularly important.The SCR catalyst of heavy metal arsenic poisoning is studied, and it is regenerated, by the recovery to waste catalyst
Using there is very big real value, beneficial to the cycling and reutilization for realizing limited resources.
The discarded SCR denitration of rationally processing has tremendous contribution to environmental protection and economic benefit.Therefore, it is of the invention
The SCR denitration inactivated for arsenic poisoning, according to the chemical property and feature of arsenic, explores the regeneration side of arsenic poisoning catalyst
Method, has obtained rationally effective technical scheme.
The content of the invention
It is an object of the invention to provide a kind of technique is simple, the arsenic poisoning SCR denitration of economical and efficient regeneration
Method.
1st, according to the invention provides a kind of renovation process of utilization mixed solution to the SCR denitration of arsenic poisoning,
This method comprises the following steps：
(1), arsenic poisoning SCR denitration is ground first and sieved；
(2), by catalyst fines obtained by step (1), it is put into regenerated liquid and impregnates regeneration；
(3), regenerated catalyst obtained by step (2) is separated with regenerated liquid, then repeatedly rinsed with deionized water；
(4), by the regenerated catalyst in step (3), constant temperature blast drying oven drying is put into, that is, the SCR regenerated takes off
Denox catalyst.
2nd, in described step (1), catalyst fines particle meets 20-40 mesh.
3rd, in described step (2), regenerated liquid is the mixed liquor of acetic acid and sodium carbonate, and the solution of acetic acid and sodium carbonate is molten
Degree is 1mol/L, impregnates regenerative response time 2 h, every half an hour stirring once.
4th, in described step (3), regenerated catalyst is rinsed repeatedly with deionized water until the pH of cleaning fluid is 6.5-7.
5th, in described step (4), the temperature in regulating thermostatic air dry oven is 110 DEG C, and drying time is 12 hours.
Beneficial effects of the present invention：
Mixed solution of the invention using acetic acid and sodium carbonate is to the renovation process of the SCR denitration of arsenic poisoning, arsenic
Arsenic in poisoned catalyst is combined with active component vanadium, is reduced the original active sites of catalyst and is caused inactivation.In mixed liquor
Sodium carbonate can react the natrium arsenicum material that generation is more stablized with the arsenic in arsenic poisoning catalyst, so as to remove arsenic poisoning catalyst
In arsenic, reduce arsenic poisoning effect.The acidic site of catalyst can also be improved with certain acid acetic acid.Such a mixing is again
The method of raw liquid regeneration arsenic poisoning catalyst can not only efficiently remove removing heavy metals noxious material arsenic, and its technological operation is also simply passed through
Ji, energy consumption are small, have higher value to regeneration heavy metal poisoning catalyst.
Embodiment
Illustrate present disclosure with reference to specific embodiment.
Embodiment 1
A kind of renovation process of arsenic poisoning SCR denitration described in the present embodiment, comprises the following steps：
Step 1：Arsenic poisoning SCR denitration is pulverized and sieved, screening particle diameter is the catalyst powder of 20-40 mesh
End, it is a test dose to select 2g；
Step 2：The arsenic poisoning catalyst fines in step 1 is taken, is put into mixed regeneration liquid and is regenerated, regenerated liquid is vinegar
The mixed solution of acid and sodium carbonate liquor, takes 0.57ml acetic acid and 1.0599g sodium carbonate to mix and add deionized water extremely respectively
10ml, stirs, and the reaction time is 2 hours, every half an hour stirring once；
Step 3：The regenerated catalyst of step 2 is separated with regenerated liquid with separatory funnel；
Step 4：The regenerated catalyst separated with the multiple rinsing step 3 of deionized water, causes the pH value of cleaning fluid about
6.7；
Step 5：Take the regenerated catalyst in step 4 and be put into constant temperature blast drying oven and be dried, temperature adjustment is arrived
110 DEG C, dry 12 hours, that is, the SCR denitration regenerated；
After testing, the arsenic decaying catalyst denitration efficiency of a such a test dose is 64.05%, regenerated catalyst denitration effect
Rate is 80.76%.Regeneration effect is notable.This regeneration technology flow is simple to operation, economical and efficient, can be as in preferable As
The renovation process of malicious inactivation SCR denitration catalyst.
Claims (5)
1. a kind of renovation process of arsenic poisoning SCR denitration, it is characterised in that this method includes following steps：
(1), arsenic poisoning SCR denitration is ground and sieved；
(2), arsenic poisoning catalyst fines obtained by step (1) is put into impregnate in regenerated liquid and regenerated；
(3), regenerated catalyst obtained by step (2) is separated with regenerated liquid, then repeatedly rinsed with deionized water；
(4), by regenerated catalyst obtained by step (3), constant temperature blast drying oven drying is put into, that is, the SCR denitration regenerated is urged
Agent.
2. a kind of renovation process of arsenic poisoning SCR denitration according to claim 1, it is characterised in that：Described
In step (1), arsenic poisoning SCR denitration is ground and sieved, particle diameter meets 20-40 mesh.
3. a kind of renovation process of arsenic poisoning SCR denitration according to claim 1, it is characterised in that：Described
In step (2), regenerated liquid dipping night is the mixed solution of acetic acid and sodium carbonate, and meets acetic acid and sodium carbonate liquor concentration is
1mol/L, regeneration impregnation 2 hours, is stirred once per half an hour.
4. a kind of renovation process of SCR denitration arsenic poisoning according to claim 1, it is characterised in that：Described
In step (3), deionized water is rinsed repeatedly until its cleaning fluid pH is 6.5-7.
5. a kind of renovation process of SCR denitration arsenic poisoning according to claim 1, it is characterised in that：Described
In step (4), the temperature adjustment in constant temperature blast drying oven is to 110 DEG C, and drying time is 12 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710389357.7A CN107096578B (en) | 2017-05-19 | 2017-05-19 | Regeneration method of arsenic poisoning SCR denitration catalyst |
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| CN201710389357.7A CN107096578B (en) | 2017-05-19 | 2017-05-19 | Regeneration method of arsenic poisoning SCR denitration catalyst |
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| CN107096578A true CN107096578A (en) | 2017-08-29 |
| CN107096578B CN107096578B (en) | 2020-05-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112718778A (en) * | 2019-10-14 | 2021-04-30 | 中国科学院过程工程研究所 | Method for deep dearsenification in waste SCR catalyst acid system |
| CZ309106B6 (en) * | 2019-01-07 | 2022-02-02 | Uniwersytet Śląski W Katowicach | Method of regenerating completely or partially deactivated SCR catalysts |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009113995A1 (en) * | 2008-03-11 | 2009-09-17 | Evonik Energy Services Llc | Method of regeneration of scr catalyst |
| CN104028316A (en) * | 2014-06-03 | 2014-09-10 | 陈凯 | Regeneration method of arsenic-poisoned selective catalytic reduction (SCR) denitrification catalyst |
| WO2015016553A1 (en) * | 2013-08-01 | 2015-02-05 | 주식회사 아주엔비씨 | Semi-insitu scr catalyst regeneration method |
| CN105879930A (en) * | 2016-04-08 | 2016-08-24 | 天河（保定）环境工程有限公司 | Abandoned denitration catalyst recycling alkaline-washing solution and method |
| CN105944770A (en) * | 2016-04-26 | 2016-09-21 | 华北电力大学（保定） | Organic acid regeneration method of alkali inactivated SCR denitration catalyst |
| CN106179532A (en) * | 2016-06-28 | 2016-12-07 | 重庆远达催化剂制造有限公司 | A kind of arseniasis denitrating catalyst regenerated liquid and application |
-
2017
- 2017-05-19 CN CN201710389357.7A patent/CN107096578B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009113995A1 (en) * | 2008-03-11 | 2009-09-17 | Evonik Energy Services Llc | Method of regeneration of scr catalyst |
| WO2015016553A1 (en) * | 2013-08-01 | 2015-02-05 | 주식회사 아주엔비씨 | Semi-insitu scr catalyst regeneration method |
| CN104028316A (en) * | 2014-06-03 | 2014-09-10 | 陈凯 | Regeneration method of arsenic-poisoned selective catalytic reduction (SCR) denitrification catalyst |
| CN105879930A (en) * | 2016-04-08 | 2016-08-24 | 天河（保定）环境工程有限公司 | Abandoned denitration catalyst recycling alkaline-washing solution and method |
| CN105944770A (en) * | 2016-04-26 | 2016-09-21 | 华北电力大学（保定） | Organic acid regeneration method of alkali inactivated SCR denitration catalyst |
| CN106179532A (en) * | 2016-06-28 | 2016-12-07 | 重庆远达催化剂制造有限公司 | A kind of arseniasis denitrating catalyst regenerated liquid and application |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ309106B6 (en) * | 2019-01-07 | 2022-02-02 | Uniwersytet Śląski W Katowicach | Method of regenerating completely or partially deactivated SCR catalysts |
| CN112718778A (en) * | 2019-10-14 | 2021-04-30 | 中国科学院过程工程研究所 | Method for deep dearsenification in waste SCR catalyst acid system |
| CN112718778B (en) * | 2019-10-14 | 2022-08-12 | 中国科学院过程工程研究所 | Method for deep dearsenization in waste SCR catalyst acidic system |
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